diff --git a/bacnet-stack/Makefile b/bacnet-stack/Makefile
index 868bad6a..097266be 100644
--- a/bacnet-stack/Makefile
+++ b/bacnet-stack/Makefile
@@ -70,28 +70,28 @@ all: library demos
 .PHONY : all library demos clean
 
 library:
-	$(MAKE) -C lib all
+	$(MAKE) -s -C lib all
 
 demos:
-	$(MAKE) -C demo all
+	$(MAKE) -s -C demo all
 
 router:
-	$(MAKE) -C demo router
+	$(MAKE) -s -C demo router
 
 # Add "ports" to the build, if desired
 ports:	atmega168 bdk-atxx4-mstp at91sam7s
 	@echo "Built the ARM7 and AVR ports"
 
 atmega168: ports/atmega168/Makefile
-	$(MAKE) -C ports/atmega168 clean all
+	$(MAKE) -s -C ports/atmega168 clean all
 
 at91sam7s: ports/at91sam7s/makefile
-	$(MAKE) -C ports/at91sam7s clean all
+	$(MAKE) -s -C ports/at91sam7s clean all
 
 bdk-atxx4-mstp: ports/bdk-atxx4-mstp/Makefile
-	$(MAKE) -C ports/bdk-atxx4-mstp clean all
+	$(MAKE) -s -C ports/bdk-atxx4-mstp clean all
 
 clean:
-	$(MAKE) -C lib clean
-	$(MAKE) -C demo clean
-	$(MAKE) -C demo/router clean
+	$(MAKE) -s -C lib clean
+	$(MAKE) -s -C demo clean
+	$(MAKE) -s -C demo/router clean
diff --git a/bacnet-stack/demo/Makefile b/bacnet-stack/demo/Makefile
index 819bd4bd..cbc0803d 100644
--- a/bacnet-stack/demo/Makefile
+++ b/bacnet-stack/demo/Makefile
@@ -73,7 +73,7 @@ TARGETS = all clean
 $(TARGETS): %: $(patsubst %, %.%, $(SUBDIRS))
 
 $(foreach TGT, $(TARGETS), $(patsubst %, %.$(TGT), $(SUBDIRS))):
-	$(MAKE) -b -C $(subst ., , $@)
+	$(MAKE) -s -b -C $(subst ., , $@)
 
 router:
-	$(MAKE) -b -C router
+	$(MAKE) -s -b -C router